How many moles are in 19.82 g Mg?
Unit 6 Flashcard Review Regents

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•
Chemistry
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
0.8156 mol Mg
2.
FLASHCARD QUESTION
Front
How many moles are in 6.022 x 10^23 molecules of H2O?
Back
1 mole
3.
FLASHCARD QUESTION
Front
What is the mass of 1 mole of PbO2?
Back
239 g/mol
4.
FLASHCARD QUESTION
Front
How is moles abbreviated?
Back
mol
5.
FLASHCARD QUESTION
Front
What is the percent composition of fluorine in CaF2 (gram-formula mass = 78 g/mol)?
Back
49%
6.
FLASHCARD QUESTION
Front
What is the definition of a mole in chemistry?
Back
A mole is a unit that measures the amount of substance, defined as exactly 6.022 x 10^23 particles (atoms, molecules, etc.).
7.
FLASHCARD QUESTION
Front
What is the formula to calculate the number of moles?
Back
Number of moles = mass (g) / molar mass (g/mol).
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